I use cane -> plant balls -> ic2 biofuel in GT diesel generator. Or seed oil in a semifluid generator, or any number or ways.
Look at all the various ways you can generate EU in your world. GT adds a ton of different generators. Next, take a look at the fuel sources. If you mouse over the capsules and cells in NEI, it should show you how much energy you will get from it and in which generator. Then figure out a way to produce those fuel sources in quantities that would make it worth while. Make a list of machines you would need to do this, then see if you have the resources to make it.
My current generation wasn't enough to power all the industrial machines I needed, so after looking at what I had, I built a zero chamber thorium nuclear reactor that outputs 32eu/tick. that was the best for my needs, but yours may be different.